Tire valve



Nov. 3, 1925.

H. P. KRAFT TIRE VALVE Original Filed July 22,1921

noemtoz @j formed as a pai-trot the check Patented Nov. 5, 1923.5.

lUNITI-:D STATE-s HENRY P. KRAFT, lor mnenwocn, NEW J BARR EXECUTORS 0F THE WILL or ERSEY; EDGARYJ. PHILLIPS AND EARL A.

sain HENRY P. KRAFT, DECEASED.

Tran VALVE.

Application filed July 22, 1921, rSerial No. 486,812. 'Renewed January, 192,4..V

.To ai] uiiom it may conc-cfm.' Y

Be it known thatI, HENRY P. Knaur, a 'citizen otthe United States ot America, residing iu Ridgewood, in the county of Bergen and State of New Jersey, have invented certain new and vusetul Improvements in Tire Valves, of which the following is a specification. v

This invention relates to valves for tires or the like, and aims to provide certain improvements therein.

In the standard tire valve the so-called valve insides comprise a seat member, a screw-threaded plug swivelled to the seat member, a valve check, a valve spring ber-.eath the check, and a spring holder beneath the spi-nig, all ot' the parts being traversed b v a pin. which extends to a point near the top ot' the valve casing and passes downwardly through the cheek, spring and spring cup.

According to the present invention the pin in so far as it extends above the check is replaced by a tubular member, either or connected therewith. This tubular member is of large diameter just sufficient to slide easily through the valve seatand swivelled plug. lb.' this construction I am not only enabled to produce a precise guiding ot the check against its seat. but I am also enabled to assist the screw plug and seat in keeping in alinenient. @penings for the air arevprovided at the bottom ot the tubular member, just above the check, the mainV body of the air passing down the tube during inflation until it reaches the openings, whereupon it passes out laterally. Conversely, during deflation, the air passes up alongsidel of the check and before it passes through the seat. its path is deflected laterally into the tube. By this means there is less tendency to strip the packing of the check from its seat.

Referring to the drawings, which illustrate several forms of the invention,

Figure l is a Vdiametrical section ol the upper part of a valve easing, showing the valve insides provided by the present invention.

Fig. 2 is a similar view with a slight moditication.

' Fig@ is an elevation of the check with its i pin and tube detached.

fFigpetlis across-section on the line v-lp/l in Fig. l.

Fig. 5 is a sectional view of the check with its pin and tube detached, showing a modilication..

Fig. G is a plan of Fig. 5

Ilelerriini` to the drawings7 let A indicate the valve stein or casing of usual torni, Il the valve cap, C the valve seat and D the screw-threaded plug swivelled to the valve seat. t-he valve check having a packing F, G the valve spring and H the spring cup.

According to the present invention the valve check E has projecting from its upper side a tube I which is preferably `formed with a slightly expanded .mouth J. The tube I may be integrally connected with the valve check, as shown in Fig. l, or it may be riveted therein, as shown in Fig. 2, or it may constitute a complete pin, as shown in Fig. The. tube is provided at its bottom with a hole or holes. K, through which air passes into the chamber L when the valve is in its open condition, as shown in Fig( 2. The outside diameter ot the tube is preferably a nice sliding` :tit with the bore of the plug D and seat C, so that the movements ot the check up and down are well guided, and

there is little liability of tilting'or canting y o'l the valve check on its seat. So also the swivelled connection betweenthe plug D4 and the seat C is better guided so that the parts are enabled to keep more closely in alinement, while at the same time allowing for that looseness ol connection which is necessary to produce a tight joint between the seat and the stem, by means of the packing M. It will be understood that in the making of valves by automatic machinery errors are bound to occur in the precise sizes ot' the parts, and these may be compensated for in order to produce a practical working struc-ture in considerable quantities.

It will also be noted from an inspection of the chamber' L must turn rather sharply inward in order to pass throughv the aper# turesor holes K. This tends to lessen the liability of the paeli'ng- M from stripping off its seat, since it tends to prevent the out coming stream of air from exerting a powerful suction on the packing.

In Fig. l the cheek is provided on its lower side with a pin P which enters a recess in the Cheek, the parts being sivaged together. In Fig. 2 Vthe tube I is formed separately from the Check, and connected therewith in a similar fashion. In Fig. ..5 the tube I2 and pin P are formed in one and the saine piece, the check being connected to the pin below the tube.

IVhile I have shown and described one form of the invention, it Willbevunderstood that .I do not Wish `to be limited thereto,

said passages, and the top of said tubular pin being flared outwardly to a diameter vlarger than that of the passage through the plug.

In witness whereof, I have .hereunto HENRY P'. KRAFT.

signe d in v name. 

